Ingredients

• Ingredients
  1. 1/2 cup green lentils
  2. Salt
  3. 1/4 pound pancetta, sliced 1/4 inch thick and finely diced
  4. 6 garlic cloves, minced
  5. 2 carrots, finely diced
  6. 2 celery ribs, finely diced
  7. 1 onion, finely diced
  8. 1 medium red potato, finely diced
  9. 1/2 cup finely diced peeled celery root
  10. 1/2 cup finely diced peeled butternut squash
  11. 1/2 finely diced peeled rutabaga
  12. 1 bay leaf
  13. Freshly ground pepper
  14. 2 1/2 quarts chicken stock or canned low-sodium broth
  15. 2 tablespoons chopped parsley
  16. 1 tablespoon chopped thyme
  17. 1/4 pound Gruyère, thinly shaved

Directions

1. In a small saucepan, cover the lentils with 1 inch of water and add a large pinch of salt. Cover and bring to a boil. Simmer over low heat, stirring occasionally, until tender, about 20 minutes. Drain.
2. In a large saucepan, cook the pancetta over moderately low heat, stirring, until most of the fat has been rendered, about 8 minutes. Add the garlic, carrots, celery, onion, potato, celery root, squash, rutabaga and bay leaf and cook over moderately high heat for 2 minutes, stirring to coat with fat. Season with salt and pepper and cook until the vegetables soften, about 3 minutes longer. Add the chicken stock and bring to a boil. Reduce the heat to low and simmer until the vegetables are tender, about 20 minutes. Discard the bay leaf.
3. Stir in the lentils, parsley and thyme and season with salt and pepper. Ladle the soup into bowls, top with Gruyère shavings and serve piping hot.

Make Ahead

The soup can be refrigerated for 3 days.